Recent Log Entries

Log Number: 4153259Logbook(s): 

• ELOG

Body: 

ITV0I05 - cables disconnected, air solenoid bracket dismounted from girder, cables coiled up and out of the way
ITV0I06 - cables disconnected, air solenoid bracket dismounted from girder, cables coiled up and out of the way
ITV0I06A - cables disconnected, air solenoid bracket dismounted from girder, cables coiled up and out of the way
ITV1D00 - cables disconnected, air solenoid bracket dismounted from girder, cables coiled up and out of the way

FCup1 - cables disconnected, air solenoid bracket dismounted from girder, cables coiled up and out of the way

Aperture 3 - cables disconnected, air

Log Number: 4153253Logbook(s): 

• ELOG

Body: 

Yes that is the current schedule, which has two weeks of float at the end. (e.g. if something gets delayed up front those dates will be later. Adding 2L23 in would add another week between 2L24 and 2L22.

Here is a link to the OSP.

https://misportal.jlab.org/mis/apps/mis_forms/operational_safety_procedu...

On 2L23 Folks should understand that it went into the machine field emission free at 98 MeV. When I measured it in Feb. that number had dropped to 70 MeV. Had it maintained something close to 98 MeV I would not be asking to do it.

Log Number: 4153248Logbook(s): 

• ELOG

Body: 

The MUX boxes and RF modules in the East Arc (quad stacks from EA015 to EA32) have been dismounted from the girders. Ready for S&A.

Dela Cruz, S.Green

Log Number: 4153245Logbook(s): 

• CLOG
• ELOG

Entry Makers: thilanBody: 

Lowering FL02 and LCLS CM03 in LERF in prep for utubes on Mon. Will lower FL01 tomorrow

Log Number: 4153241Logbook(s): 

• ELOG

Body: 

Because 2L23 has not been approved, I'd like to list the processing schedule for confirmation :

2L25 1 May to 5 May
2L24 8 Man to 12 May
2L22 15 May to 19 May

In addition, an OSP will need to accompany this task to ensure that it will be executed with the proper safeguards in place before being approved.

Log Number: 4153200Logbook(s): 

• ELOG

Body: 

Vented line between VBV3H04 to VBV3C20. Disconnected ion-pumps and gauges between valves.

Log Number: 4153170Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L23-5
Username: michaelm
Date/Time: 03-23-23_10:16:26
RF Status: Good
Tuner Status: Good
Comment: NDX and fault rate limited
Special Instructions:

Log Number: 4153169Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L23-4
Username: michaelm
Date/Time: 03-23-23_10:15:27
RF Status: Good
Tuner Status: Good
Comment: NDX limited to 12.6; Body current fault limited from there
Special Instructions:

Log Number: 4153168Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L23-1
Username: michaelm
Date/Time: 03-23-23_10:14:14
RF Status: Good
Tuner Status: Good
Comment: 18.1 CWWT limited
Special Instructions:

Log Number: 4153165Logbook(s): 

• CLOG
• ELOG

Entry Makers: thilanBody: 

Switched SLinac PS and PR to CHL2. Shutting off CHL1 and doing utubes for shutdown

Log Number: 4153162Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  PD SUMMARY Summary    

INJ: 

Log Number: 4153160Logbook(s): 

• CLOG
• ELOG

Entry Makers: wisslerBody: 

Lowering 0L00 liquid level to 20% for u-tubes tomorrow, will be lowering 2L25 and 2L26 later today.

Log Number: 4153150Logbook(s): 

• ELOG

Body: 

Lock outs completed yesterday. The plan is to start stand checks today.

Log Number: 4153149Logbook(s): 

• ELOG

Body: 

Lock out was completed yesterday. The plan is start the re-fid today.

Log Number: 4153147Logbook(s): 

• ELOG

Body: 

Looks like the work was started earlier than scheduled....

Approved

Log Number: 4153130Logbook(s): 

• ELOG

Body: 

Test

Log Number: 4153129Logbook(s): 

• ELOG

Body: 

Test

Log Number: 4153124Logbook(s): 

• ELOG

Body: 

After Marcy, Phil, Jessica and Tony swapped A2 region viewer and harp, we disconnected the chopper region from the phase2 region beamline. And we disconnected the keV spectrometer beamline. We added blank flanges at a couple locations and pumped the capture region back down, which restored vacuum in the upstream 'warm girder' region of the 1/4 CM.

We also removed some water flow meters, magnets, and assorted odds and ends as part of our dismantling of the 'old' phase2 beamline.

Log Number: 4153121Logbook(s): 

• ELOG

Entry Makers: poelkerBody: 

This morning, we vented the chopper region and through the capture, all the way to valve VBV0I07 which was CLOSED. WE know this valve leaks, we monitored vacuum downstream of this valve with a local gamma supply. All three SRF valves associated with the 1/4 CM were closed. While the chopper/capture region was vented, the ion pump current downstream of leaky valve VBV0I07 went up three orders of magnitude. The space downstream of valve VBV0I07 is called the upstream 'warm girder' region of the 1/4 CM.

Log Number: 4153063Logbook(s): 

• ELOG

Body: 

Magnet Measurement:

Status update for SL warm region girders at MQL2L26-MQL2L27.

We have completed all magnet work/disassembly at these two girder locations. The LCW is OFF, and quads are ready to be separated, minus we left one bolt in each quad finger tight (aisle side-please place bolt in bin) just to avoid any incident. The DB/DJ corrector pairs are removed as well. So, Tony can get to the BPM cables and disconnect, and Greg and vacuum group are ready to roll. Adding S/A in case Chris has any work prior to removal.